Experimental and numerical study on bearing failure of countersunk composite–composite and composite–steel joints

Yang, Biao; Yue, Zhufeng; Geng, Xueyu; Guan, Xiao; Wang, Peiyan

doi:10.1177/0021998316684936

Cited by 9 publications

(5 citation statements)

References 23 publications

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“…Metal joints have uniform stress forms and stable mechanical properties. However, they are quite heavy and have poor thermal stability under high- and low-temperature conditions; therefore, they are not suitable for applications in the field of aerospace engineering, which has strict temperature requirements (Ryu et al, 2007; Yang et al, 2017; Zhou et al, 2016). 3D braided composite joints are lightweight and have good stability.…”

Section: Conceptual Design and Fabrication For Cfrp Trussesmentioning

confidence: 99%

Structural design and experimental study on the axial compression behavior of large-span carbon-fiber-reinforced polymer truss structures

Li,

Chen,

et al. 2023

Advances in Structural Engineering

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Herein – with the optimization goals of a lightweight, large-span structure; modularization; and heavy loading – a tapered-section truss module and standard truss module are integrated and assembled, yielding a new design for an all-carbon-fiber-reinforced polymer (CFRP) truss structure. The design structure fully considers the mechanical characteristics of the truss and the requirements of standardized production efficiency, integrating the “fish keel” structural design method to give it a hollow structure style. By fabricating two 1:1 truss structures (A-Truss and B-Truss) with a length of 20.4 m, the conceptual design, modular design method, and integrated assembly technology of the truss structure were effectively verified; further, experimental research on the strength performance of the mold-clave-forming plate-type joint and the axial compression behavior of large-span full CFRP truss structure is carried out. The failure position of the truss structure is determined, and an enhancement measure for the key connection joint between the truss modules is proposed. Based on specific application scenarios, it is clear that the truss meets the design requirements in terms of bearing capacity and deformation, and can be used as the main bearing structure of large aircraft and aerospace assembly platforms.

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Section: Conceptual Design and Fabrication For Cfrp Trussesmentioning

confidence: 99%

Structural design and experimental study on the axial compression behavior of large-span carbon-fiber-reinforced polymer truss structures

Li,

Chen,

et al. 2023

Advances in Structural Engineering

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“…To accurately view surface strain fields and overcome the divergence issues of laminates, novel experimental and modeling methods have been proposed, such as using digital image correlation (DIC) measurement by Zhai et al, 17 Haris et al, 18 Hu et al 19 and explicit models by Liu et al, 20 Hu et al. 21 Classical progressive damage models by Yang et al, 22 Chowdhury et al, 23 Ge et al 24 were proved to be accurate for capturing the bolt load change or material damage propagation procedure for cracked laminates. Zou et al 25 analyzed the effect of fit conditions on laminate damage mechanism and load-displacement curve, concerning interference-fit instead of neat-fit or clearance-fit.…”

Section: Introductionmentioning

confidence: 99%

Damage mode and load distribution of countersunk bolted composite joints

Cheng

Huang³

et al. 2020

Journal of Composite Materials

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Tensile experiments were conducted with single-bolted and multi-bolted countersunk composite-metal joints. The finite element models with Hashin criteria and modified Camanho degradation law were developed to predict the bearing load and to simulate the failure behavior. The models were validated with the experimental results, including load-displacement curves and composite damage profiles. Based on the verified models, bolt load distributions of multi-bolted joints were calculated and analyzed before and after damage occurs. Results show that composite damages can change the bolt load distributions to a certain extent, which needs to be considered during the structure design. To adjust the bolt load distribution, the effects of joint variables, including bolt-hole clearance, bolt spacing, countersunk height ratio, and bolt stiffness combination, have been studied. It is found that the increase of the pin clearance around the largest bearing bolt would decrease its corresponding bearing load. The countersunk height ratio affects the bolt load distribution difference that a greater ratio leads to a less difference. The bolt spacing and bolt stiffness can also be used to reduce the bolt load distribution difference with elaborately designed combinations.

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“…Complementing the investigation and study, Baifeng Yang [7] explores the bearing failure of countersunk composite-composite and composite-steel joints, Peng Zou [8] concentrates in interference-fit double shear-lap pin-loaded composite and uses the Camanho and Matthews [9] degradation rules, and Dumitru and Constantinescu [10] present the effects of temperature on the damage initiation and growth in the carbon fiber-reinforced polymer composite laminate of a hybrid aluminum-composite countersunk bolted joints designed for the bearing failure mode using temperature values of + 50° C and − 50° C.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation about composite bearing strength

Arakaki

Faria

2020

J Braz. Soc. Mech. Sci. Eng.

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The bearing investigation on mechanical joints of composite materials is extensive. The main reason for bearing investigation, in a certain aspect, is related to the variability of parameters associated with bearing behavior. In this sense, theoretical and/or experimental studies have been exhaustively conducted. Depending on the solution obtained, there is a cost/benefit relationship for the problem in question. However, in the case of aeronautical applications, an important factor to be considered is the safety, which reflects into safety margin. In this sense, an excess of tests is needed for design that reflects in high cost and time-consuming. Therefore, simpler approaches are necessary in the pre-design phase, where quick answers are required for the initial product definition. In this way, the present work presents composite bearing tests with two distinct environmental conditions, i.e., low-temperature dry (LTD) and room-temperature dry (RTD) in order to show that there is one procedure to simplify the process and gain cost and time. For this, five different configurations specimens with 12 coupons each one were tested in two different environmental conditions. The fastened joint manufactured used protruding fastener, two different diameters (3/16″ and 5/32″) and three laminates (10, 12 and 14 plies). Based on the ASTM D5961 standard, the experimental results showed a linear response not showed in the literature for composite materials. The proposal presented here showed an excellent way to avoid others tests with different conditions, i.e., with different layups and fastener diameters.

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Experimental and numerical study on bearing failure of countersunk composite–composite and composite–steel joints

Cited by 9 publications

References 23 publications

Structural design and experimental study on the axial compression behavior of large-span carbon-fiber-reinforced polymer truss structures

Structural design and experimental study on the axial compression behavior of large-span carbon-fiber-reinforced polymer truss structures

Damage mode and load distribution of countersunk bolted composite joints

Experimental investigation about composite bearing strength

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